Piston pump is through a fixed seal, a piston moves back and forth. Piston pump relies on the reciprocating motion of the piston to make the working volume of the pump chamber change periodically, so as to realize the suction and discharge of liquid. The seal of the plunger pump is installed on the plunger and passes through a smooth cylinder wall. It is mainly a pump that uses the plunger to move back and forth in the pump cylinder to change the volume between the plunger and the pump wall, repeatedly inhale and discharge liquid and increase its pressure. Generally, the plunger pump has better initial use characteristics. Its advantages are high rated pressure, compact structure, high efficiency and convenient flow regulation. However, its disadvantages are that it can not operate at too high pressure and its service life is short.
The water capacity of the pump depends on the running speed of the pump. The pump must allow the same amount of water to enter and exit. The water flow parameters of the piston pump are stable, that is, the water flow ejected under different pressures of the equipment is constant. Therefore, if the nozzle or high-pressure pipe is blocked, the pressure of the high-pressure pump will be too large. Therefore, devices such as pressure relief valves must be installed in the equipment system.
The most common cause of failure of high-pressure cleaning machine is not the pump. Pump failure is generally caused by the wear of components or parts, such as the wear of nozzle seals.
Generally speaking, the insufficient water inflow in the pump is one of the most important reasons for the failure of the pump in the early use stage. Generally speaking, it is because the inlet pipe diameter is too small or the water supply is insufficient, which leads to insufficient water entering the pump, causing cavitation in the pump. Cavitation causes small explosion of the gas mixed in the water, resulting in overpressure damage and piston surface wear.
